Results 101 to 110 of about 176,075 (225)

Bar rejuvenation in S0 galaxies? [PDF]

, 2020
Based on the colour measurements from a multi-band, multi-component 2D decomposition's of S0 and spiral galaxies using SDSS images, we found that bars are bluer in S0 galaxies compared to the spiral galaxies. Most of the S0s in our sample have stellar masses $\sim L_{*}$ galaxies.
arxiv   +1 more source

Enhancing Color Gamut with Wavelength‐Selective Polarization Modulation in Chiral Liquid Crystals

Advanced Optical Materials, Volume 13, Issue 4, February 3, 2025.
This study presents a method to broaden the color range of dichroic dye‐doped liquid crystal films by integrating cholesteric liquid crystals as polarization modulators. The approach enables precise control over transmission colors through wavelength‐ and polarization‐selective absorption, achieving new color variations, including green, and offering ...
Hyewon Park, Juyeol Kim, Geonhyeong Park, Dong Ki Yoon   +3 more
wiley   +1 more source

Multicolor Photometry of Barred Spiral Galaxies [PDF]

International Astronomical Union Colloquium, 1996
B – V and R – I color maps (from CCD imagery obtained at Cerro Tololo Inter-American Observatory) of six barred spiral galaxies have been used (Horst 1992) to investigate stellar populations within the bars and nuclei. Two-color diagrams show that the distribution of pixel colors largely parallels the expected locus for normal unreddened stars. If the “
William D. Horst, Charles J. Peterson
openaire   +2 more sources

How Nested Bars Enhance, Modulate, and Are Destroyed by Gas Inflows

The Astrophysical Journal, 2023
Gas flows in the presence of two independently rotating nested bars remain not fully understood but are likely to play an important role in fueling the central black hole.
Zhi Li, Min Du, Victor P. Debattista, Juntai Shen, Hui Li, Jie Liu, Mark Vogelsberger, Angus Beane, Federico Marinacci, Laura V. Sales   +9 more
doaj   +1 more source

Effect of bars on the galaxy properties [PDF]

A&A 595, A63 (2016), 2016
Aims: With the aim of assessing the effects of bars on disc galaxy properties, we present an analysis of different characteristics of spiral galaxies with strong, weak and without bars. Method: We identified barred galaxies from the Sloan Digital Sky Survey.
arxiv   +1 more source

Effective Gene Expression Prediction and Optimization from Protein Sequences

Advanced Science, Volume 12, Issue 8, February 24, 2025.
Understanding the correlation between protein sequences and expression is essential for many research and applications. This study introduced a new mathematical model to confirm the association between protein sequence and expression. The pre‐trained protein model, MP‐TRANS, is developed and fine‐tuned using transfer learning techniques to create ...
Tuoyu Liu, Yiyang Zhang, Yanjun Li, Guoshun Xu, Han Gao, Pengtao Wang, Tao Tu, Huiying Luo, Ningfeng Wu, Bin Yao, Bo Liu, Feifei Guan, Huoqing Huang, Jian Tian   +13 more
wiley   +1 more source

The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies

The Astrophysical Journal
As galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz, Karen L. Masters, Kathryne J. Daniel, David V. Stark, Francesco Belfiore   +4 more
doaj   +1 more source

Galactic Bar Resonances with Diffusion: An Analytic Model with Implications for Bar–Dark Matter Halo Dynamical Friction

The Astrophysical Journal, 2023
The secular evolution of disk galaxies is largely driven by resonances between the orbits of “particles” (stars or dark matter) and the rotation of non-axisymmetric features (spiral arms or a bar).
Chris Hamilton, Elizabeth A. Tolman, Lev Arzamasskiy, Vinícius N. Duarte   +3 more
doaj   +1 more source

The population of barred galaxies in the local universe I. Detection and characterisation of bars [PDF]

, 2009
(Abridge) Bars are very common in the centre of the disc galaxies, and they drive the evolution of their structure. A volume-limited sample of 2106 disc galaxies extracted from the Sloan Digital Sky Survey Data Release 5 was studied to derive the bar fraction, length, and strength as a function of the morphology, size, local galaxy density, light ...
arxiv   +1 more source

Manifold spirals in barred galaxies with multiple pattern speeds [PDF]

A&A 636, A44 (2020), 2019
In the manifold theory of spiral structure in barred galaxies, the usual assumption is that the spirals rotate with the same pattern speed as the bar. Here we generalize the manifold theory under the assumption that the spirals rotate with different pattern speed than the bar.
arxiv   +1 more source